Enum Signature 

pub enum Signature {
    V1(Vec<CertificateInfo>),
    V2(Vec<CertificateInfo>),
    V3(Vec<CertificateInfo>),
    V31(Vec<CertificateInfo>),
    V4,
    ApkChannelBlock(String),
    StampBlockV1(CertificateInfo),
    StampBlockV2(CertificateInfo),
    PackerNextGenV2(Vec<u8>),
    GooglePlayFrosting,
    VasDollyV2(String),
    Unknown,
}

Describe used signature scheme in APK

Basic overview: https://source.android.com/docs/security/features/apksigning

Variants

V1(Vec<CertificateInfo>)

Default signature scheme based on JAR signing

See: https://source.android.com/docs/security/features/apksigning/v2#v1-verification

V2(Vec<CertificateInfo>)

APK signature scheme v2

See: https://source.android.com/docs/security/features/apksigning/v2

V3(Vec<CertificateInfo>)

APK signature scheme v3

See: https://source.android.com/docs/security/features/apksigning/v3

V31(Vec<CertificateInfo>)

APK signature scheme v3.1

See: https://source.android.com/docs/security/features/apksigning/v3-1

V4

APK signature scheme v4

See: https://source.android.com/docs/security/features/apksigning/v4

Right now it’s just a stub. Need help/a hint on how to correctly implement the parsing of this signature.

ApkChannelBlock(String)

Some usefull information from apk channel block

StampBlockV1(CertificateInfo)

Stamp Signing Block v1

See: https://xrefandroid.com/android-16.0.0_r2/xref/tools/apksig/src/main/java/com/android/apksig/internal/apk/stamp/SourceStampConstants.java#23

StampBlockV2(CertificateInfo)

Stamp Signing Block v2

See: https://xrefandroid.com/android-16.0.0_r2/xref/tools/apksig/src/main/java/com/android/apksig/internal/apk/stamp/SourceStampConstants.java#24

PackerNextGenV2(Vec<u8>)

Some Chinese packer

See: https://github.com/mcxiaoke/packer-ng-plugin/blob/ffbe05a2d27406f3aea574d083cded27f0742160/common/src/main/java/com/mcxiaoke/packer/common/PackerCommon.java#L20

Example: 75a606291d88a6c04ca9d4edfbc1b4352cf8a0aee31130f913ceee72f2dcbbbd

GooglePlayFrosting

Google Play Frosting Metadata

We just highlight the presence of the block, because the full structure is unknown to anyone in public space

For more details you can inspect: https://github.com/avast/apkverifier/blob/master/signingblock/frosting.go#L23

VasDollyV2(String)

Some apk protector/parser, idk, seen in the wild

The channel information in the ID-Value pair

See: https://edgeone.ai/document/58005

Unknown

Got something that we don’t know yet

Implementations

impl Signature

pub fn name(&self) -> String

Trait Implementations

impl Clone for Signature

fn clone(&self) -> Signature

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Signature

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Hash for Signature

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Signature

fn eq(&self, other: &Signature) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Signature

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for Signature

impl StructuralPartialEq for Signature